Perform FOTA to application built with SPM with application built with TFM

Dear All,

We are want to transition from SDK v1.6.0 to 2.1.0.

At the moment we have several devices that are were programmed with the SPM and now we want to be able to do FOTA on them to version 2.1.0 with the application using TFM.

Preliminary tests are not showing promising results, as the device simply reverts back to the original firmware that was on the device.

Is there perhaps an intermediate step that would be advised?

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